var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var nunjucks = require('nunjucks');
var session = require('express-session');

var routes = require('./routes/index');
var users = require('./routes/users');
var data = require('./routes/data');

var app = express();

// view setup
app.set('views', path.join(__dirname, 'views'));
// engine setup
nunjucks.configure('./views', {
    autoescape: true,
    express: app
});
app.set('view engine', 'html');
//自定义函数每次请求执行


// uncomment after placing your favicon in /public
app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json({limit: '1mb'}));
app.use(bodyParser.urlencoded({extended: true}));
app.use(cookieParser());
app.use(session({
    secret: 'iceonly',
    name: 'winall',
    cookie: {maxAge: 1000 * 60 * 30},
    resave: false,
    saveUninitialized: true
}));
app.use(express.static(path.join(__dirname, 'public')));
//session
app.use(function (req, res, next) {
    var rules = req.path.split('/')[1];
    if (req.url != '/users/add' && req.url != '/users/login' && req.url != '/loginstatus' && rules != 'data') {
        if (!req.session.winall) {
            res.send({success: false, msg: '未登入'})
        } else if (req.session.winall) {
            next();
        }
    } else {
        next();
    }
});
app.all('*', function (req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "X-Requested-With");
    res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
    res.header("X-Powered-By", ' 3.2.1');
    res.header("Content-Type", "application/json; charset=utf-8");
    next();
});
app.use('/', routes);
app.use('/users', users);
app.use('/data', data);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    res.send({success: false, msg: 'this is a wrong api'});
    next();
});


// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function (err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});

process.on('uncaughtException', function (err) {
    console.log(err);
});

module.exports = app;


